lecture19nth - Air is about 21 oxygen(dry air is 21 Each...

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Air is about 21% oxygen (dry air is 21%) Each gas in a mixture exerts a partial pressure (add to get total pressure of gas). 160 mm Hg/760 mm Hg = 0.21 150 mm Hg/760 mm Hg = 0.20
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Figure 17-6 Using gas laws to help us understand how lungs fill with air ideal gas law: PV = nRT (Appendix B in book p. B-3)
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